Full list of all 83 Saints Row: The Third achievements. It takes around 50-60 hours to unlock all of the achievements in the base game on Windows.
The base game contains 53 achievements, and there are 3 DLC packs containing 30 achievements.
Complete Act 1 in one way.
Complete ALL Challenges.
Steal and deliver all Vehicle Theft targets.
Find 100% of all Collectibles.
Kill 25 Gang Members each with 'the Penetrator' AND the Fart in a Jar.
Complete all City Takeover gameplay in the Stanfield district.
Complete all City Takeover gameplay in the entire city of Steelport.
Complete all instances of Activities in Co-op.
Complete all instances of Heli Assault.
Destroy all Gang Operations in Steelport.
Complete all City Takeover gameplay in the Carver Island district.
Kill all of the hitman Assassination targets.
Create and share a character online.
Complete all City Takeover gameplay in the New Colvin district.
Fully upgrade one Weapon in each slot.
Taunt AND/OR Compliment 50 gang members.
Complete all instances of Insurance Fraud.
Complete all City Takeover gameplay in the Downtown district.
Complete all instances of Trafficking.
Complete all instances of Escort.
Complete all instances of Professor Genki's Super Ethical Reality Climax.
Complete all instances of Snatch.
Kill 50 brutes.
Complete all instances of Mayhem.
Complete all instances of Trail Blazing.
Complete Act 3 in one way.
Complete all instances of Tank Mayhem.
Customize 10 vehicles.
Spend over 30 hours in Steelport.
Upgrade one Stronghold to its full glory.
Kill 1000 Gang Members.
Complete Act 3 in another way.
Beat all Missions in Co-op.
Find 25% of all Collectibles.
Complete 'Zombie Attack'.
Complete 'Murderbrawl XXXI'.
Do your first nutshot AND testicle assault.
Complete Act 2.
Complete 'http://deckers.die'.
Complete 'STAG Party'.
Play for at least 2 hours as a male character AND 2 hours as a female character.
Complete 'The Ho Boat'.
Explore every hood in Steelport.
Play SR3 Co-op for 5 hours.
Complete all instances of Guardian Angel.
Complete your first Challenge.
Hijack 50 vehicles - Dukes style.
Complete Act 1 in another way.
Complete 'We've Only Just Begun'.
Complete 'Party Time'.
Buy your first Upgrade from the Upgrade Store.
Complete 'I'm Free - Free Falling'.
Complete 'When Good Heists...'.
Roast 50 peds with the car’s flamethrower (in a single instance of Super Ethical PR Opportunity).
Complete all activity instances in Genki Bowl VII.
Kill all of the rooftop mascots (in a single instance of Sad Panda Skyblazing).
Land on Magarac Island (in Sad Panda Skyblazing).
Fly through all of the rings (in a single instance of Sad Panda Skyblazing).
Finish both instances of Apocalypse Genki.
Throw 5 mascots into the water (in a single instance of Apocalypse Genki).
Destroy a mouse ATV during Sexy Kitten Yarngasm.
Cause $150,000 worth of damage in a single Sexy Kitten Yarngasm combo.
Destroy 5 chase vehicles (in a single instance of Super Ethical PR Opportunity).
Land on the Parachute Target during the rescue scene.
Complete all missions for Gangstas in Space.
Perform all vehicle stunts with the Aegean.
Destroy 10 enemy spacecraft with the Aegean while filming.
Kill Space Brutina.
Collect all 6 hidden clapboards.
Kill 7 Space Amazons with melee attacks.
Kill 35 Space Amazons with the Laser Pistol.
Destroy all enemy spacecraft during the chase scene.
Kill 15 cameramen.
Hold Your Position at Technically Legal using only melee attacks.
Shoot down a helicopter with a Saints Flow fireball.
Complete all missions for "The Trouble With Clones".
Prevent Johnny Tag from taking damage on the Magarac Bridge.
Kill a Brute using only melee damage while under the influence of Saints Flow.
Complete mission 'Tour de Farce'.
Destroy 5 Steelport Guard vehicles during mission 'Tour de Farce'.
Spray 25 rabid fans with the Swarmitron.
Complete mission 'Weird Science'.
Destroy 45 Police and Swat Vehicles while protecting Jimmy's car.